Definitions for effervescent

One of them was a thickset young man who played doggedly without speaking, the other was an effervescent young man with white eyebrows and a nervous manner.James Joyce, Stephen Hero

Bobbing up and down, for a few seconds, like an apple in a bowl of toddy, he, at length, finally disappeared amid the whirlpool of foam which, in the already effervescent liquor, his struggles easily succeeded in creating.Edgar Allan Poe, King Pest